Gugerty also said he had been tapped as a replacement when reached for confirmation.

The reason for Guillard’s departure wasn’t immediately known, and the UFC has yet to announce the Gugerty-Fisher bout.

Fisher, a three-year veteran of the UFC, most recently defeated highly regarded lightweight prospect Jeremy Stephens at The Ultimate Fighter 7 Finale in June. The 32-year-old, a member of Iowa’s famed Miletich Fighting Systems team, will go for his fifth win in his seven fights as he continues his long-running quest for a UFC title shot.

Gugerty, meanwhile, made his debut at July’s UFC Fight Night event in Las Vegas, where he scored a first-round submission victory over the previously undefeated Dale Hartt. It was the 26-year-old’s eighth straight victory — all of which have come via stoppage (five in the first round).

As for Guillard, his up-and-down career recently took a turn for the better when he scored a March victory at a Rage in the Cage event. Guillard, 25, then returned to the UFC and posted an impressive 36-second TKO of Dennis Siver at UFC 86. “The Ultimate Fighter 2″ alumnus has won four of his past six fights.

For the latest UFC 90 fight card, which features a main event of UFC middleweight champion Anderson Silva vs. Patrick Cote, check out the UFC Rumors section of MMAjunkie.com.

UFC women’s bantamweight champion Ronda Rousey is probably the greatest female fighter on the planet, which is a tremendous feat. So why are we seemingly so obsessed with arguing about whether she could beat up men?